Coiled spring for cushions, mattresses, and the like



Sept. 7,1926. 1,598,728

H. H. KNEPPER COILED SPRING FOR CUSHIONS, MATTRESSES, AND THE LIKE Filed March 16, 1921 IV] TNESS: INVENTOR.

y i Byffar/"yff.

ATTORNEY. v

Patented Sept. 7, 1926.;

PATENT OFFICE.

HARRY H. KIUEIIPIILEIRI,v 013 DETROIT, M IQHIGAN.

COILED SPRING FOR CUSHIONS, MATTRESSES, AND THE LIKE.

Application filed. March 16, 1921. Serial No. 452,651.

This invention relates to coiled springs for use in formation of spring cushions, mattresses and the like, and the principal object of the invention is to provide a spring structure in which the coiled springs are secured together in rows, each spring of a row being hingedly connected at both the top and bottom to an adjacent spring and in which the construction of the spring and the securing means are such that the springs may be made up in rows with the desired spacing center to center of the individual springs, and in which the retaining means provides a hinge for one'of the springs and is fixedly attached to the adjacent spring whereby they are flexibly connected together and may be depressed to various extents without disarrangement.

In the construction of a spring structure 2 for cushions, mattresses and the like I arrange the coiled springs in parallel rows, the coils of each row being connected together in a flexible manner as stated. With some types of cushions the springs are de-.

sired to be spaced a greater distance apart than in others and a metal clip is used tov attach the upper and lower ends of each of the coils together. In order to avoid the use of clips of various sizes to space the springs the desired distance apart I have devised a clip and so formed the end coils of the spring to provide the desired spacing. A umform type of clip may be used with sli htly difi'ering forms of coils to secure did'erent spacing of the coils. These several objects and novel features of the invention are hereinafter more fully described and claimed, the preferred form of construction beingshown 1n the accompanying drawings 4 in which-- Fig.:' 1 shows two coils of a series of springs, connected together by a clip and showing the means of arranging the coils-to provide the desired spacing.

4 Figs. 2 and 3 show an alternative type of spring structure.

Fig. 4 is a section of the clip taken on line 4.4 of Fig. 3.

The clip, as will be readily understood from Fig. 4, consists of a strip of metal having an aperture 1 thereinthrough which an indentation or bent portion of a coil 2 and 3 may extend. This clip has one leg 4 bent about a portion 5 of one spring permittin the portion 5 to turn in the loop t ereof an for this purpose the portion of the spring .passing through the clip should be at a right angle to a diametrical line of the coil. The opposite leg 6 of the clip is bent over the indented portions 2 and 3, which lie in parallel relation therewith and, by reason of the indented portion lying between the part 6- and the body ofthe clip, the said clip is held from turning on the portions 2 and 3. The end of the leg 4: is bent about the part 5 and lies in contact with the body of the clip, as indicated in Fig. 4, with the edge thereof practically in engagement with the indented parts 2 and 3 preventing the movement of the said indented parts out of the aperture 1 and thus fixedly retains the clip in position. Fgr instance as shown in Fig. 1 the end of the coil has the indentation 2 and the next turn has a similar indentation 3 on one side thereof anddiametrically opposite the indented portion the'first coil of the spring is provided with an offset part 7 providing a straight portion 8 of Fig. 1 corresponding to the straight portion 5 of Fig. 3 and 9 of Fig. 2 about which the part 4- of the clip is bent. This straight portion is necessary in order to permit the spring to turn in the clip and, by providing the offset portion 7 as shown in Fig. 1, the said springs are spaced center to center a certain distance apart. This straight portion may be formed in several ways either by ofi'set ting one side of the coil as shown in Fi 1, or the indented portions 2 and 3 (whic is the same in all cases) may be provided in an ofiset portion 10 shown in Fig. 3. In this case the offset portion 7 is retained by which a greater spacin center to center of the springsis secure In Fig. 2 I provide the offset portion 10 as in Fig. 3 and diametrically oppositethe offset portion is a straight part 9 which is a chord of the circle formed by the end coil of the" spring. in this instance in Fig. 2 the indented portion and offset' portion are upon one side of the coil, and this straight portion is provided as shown inthe hlnging of one member to the other in closer relatlonship than in Fig. 3. By providing the inwardly bent or indented portions adapted to be nested together as shownin Figs. 1, 2 and 3 the indentations are held by the clip and rotation of the spring'is prevented in the clip on that side and where the clip is bent around a straight portion ofa coil the spring ma turn in the clip. Furthermore, by provi ing the indented portions nesting together and held in (place by the clip as heretoforestated, the en of the coil is held from displacement, the clip providing a tie therefore. Loose spring ends are thus avoided, which are a common source of trouble with other types of fastenings. The offset portions, whether provided upon one side or the other or upon both sides of the coil, may be made a greater or less distance from the center to space the coils the desired distance apart centrally and a spring cli of standard size ma be used. with any 0 thecoils, thus perm tting the rows of springs to be made upwith any necessary spacing of the component springs.

Having thus briefly described my invention, what I claim and desire to secure. by Letters Patent of the United States is-- 1. In a spring structure, a pair'of springs each having an end coil'and a succeeding, turn thereof inwardly indented on one side and diametrically opposite the said portion having the end turn provided with a straight part at a right angle to a di'ametrical line passing throu h the indentation, ,said coils having one "o the said parts the'reofofi'set at a distance from the center of the coil greater than the radius of the-coil, and said straight portion and indented'portion of ad jac'ent sprin lying in contiguous spaced relation, an a metal clipyabout the said contiguous parts having one-leg bent about the said straight part to turn thereupon and with the end of the leg positionedbetween the said spaced ortions separating the same and another le V ent about the indented portion holding 't e same from turning.-

2. In a. spring structure,' a series of'coiled dented portion 0 springs in which the end turn of each spring IS iIIdGIIiJBd-OII one side and formed with a' straight portion on the diametrically opposite side, the straight portion of one spring lying adjacent the indented portion of another, a metal clip having one end bent about the strai ht portlon of one spring to permit turning 1n the clip and with the end lying in pontact'with the body thereof, the opposite end of the cli being bent about the int the adjacent spring and overlying the said first end, the cliphaving an aperture through which the indentation may project and said first end lying in edge. contact with the said indented portion maintaining the indentation in the a erture.

3. A retaining clip for coiled springs comprising "the combination with a spring having an end turn] and a succeeding turn provided with a sharply bent ortion, the said bent portions being ada ted to be nested together and the end turn iametrically opposite the said bent portion having a straight part, a clip for connecting two such coils together consistin of a strip of metal of substantially U-shape form, one leg of which is bent about the said straight part of one coil and the other of which is bent about the nested bent portions of the adjacent coil, the clip having an aperture into which the two bent portions may extend and the first leg of the clipbeing positioned with the terminal-edge thereof in contact with the nested bent portions holding the same in the aperture.

In testimony whereof, I sign this specification. I

HARRY H. KNEPPER. 

